John 10:11-12 (HCSB)
Here is an important truth for every Christ follower. You must understand this and even count on it. People will let you down. I meet so many people who reject Christ, or drop out of Church or are very sarcastic towards Christ followers because they have been hurt or disappointed by others.
Jesus reminds us that He is the good shepherd and He lays down His life for His sheep, but others will let you down. I have told our church family, that at some point I will let you down because I am Human and sinful just like everyone else.
The lesson here is two fold. Don't allow yourself to become disgruntled with God's people because they aren't God. Second, deal with others with grace and mercy. We all need some forgiveness from time to time.